It’s a complete sentence.
The answer is C because it’s the only answer that relates to the main idea of the story
Do it over something you love , like your favorite sport , or animal. do some research over that topic and write about it
What Mark Twain is basically saying here is that pilots need
to be of the ability to make judgement calls, and the ability to make good
judgement calls depends on whether or not one is intelligent. He
takes his point further by saying that, basically, intelligence is genetic—one
is either born with intelligence or one is not.
His point is, if one is not born with “brains” (intelligence), one
cannot be a pilot because intelligence (according to this statement of Twain)
cannot be acquired.
